Hot-blast stove.



J. l. LARIMER HUT BLAST STOVE, APPLICATION FILED MAR. 6, I911- PatentedMay14, 191s.

- 2 SHEETSSHEET I- 1. LARIMER.

- HOT BLAST STOVE.

APPLICATION FILED MAR. 6. I917.

. Patented May14, 1918.

2 SHEETS-SHEET 2.

JAMES I. LARIMER, OF JOLIET, ILLINOIS.

HOT-BLAST STOVE.

To whom it may concern Be it known that I, JAMES I. LARIMER, acitizen ofthe United States, and resident of Joliet, in the county of Will andState of Illinois, have invented certain new and useful Improvements inHot-Blast Stoves, of-

which the following is a specification.

My invention relates to hot blast stoves and has particular reference tothe construction of such stoves at the upper end thereof. Theimprovement is adapted for use in connection with a stove such asdisclosed in my co-pending application Serial #130,058,

filed November 7 1916.

In order to utilize to advantage a four pass stove of the type disclosedin my copending ap lication referred to, it is essential that suitablemeans should be provided for deflecting and changing the direction ofthe gases at the upper end of the stove. In a four pass stove this mustbe done twice and I have conceived of means whereby the desired resultmay be accomplished with the smallest possible loss in the matter ofwear and abrasion of the bricks by the force of the traveling body .ofases and with the least loss of velocity. he desired results are securedby suitably curving and angularly disposing the walls to the end thatthe gases are not caused to be abruptly deflected, impingement againstwalls disposed at right angles to the flow of gases being avoided.

The desired results are secured in a four pa'ss stove by providing theusual dome which is utilized for changing the direction of the gases,locating in the dome a transverse vertical Wall which bisects the spacewithin the dome and which serves to deflect the gases from the first tothe second passes and from the third to the fourth passes. In otherwords the construction of the stove is such that a single transversevertical wall is employed for deflecting the gases from the first to thesecond pass and from the third to the fourth pass. his greatlysimplifies the building 0 erations, makes the change of direction 0 thegases less abrupt and is generally satisfactory.

The invention will be more readily understood by reference to theaccompanying drawings in which Figure 1 is a transverse vertical sectionon the line 11-of Fig. 2 through a portion of a hot-blast stoveconstructed in accordance with my invention;

I Specification of Letters Patent.

Patented May 14, 191 8.

Application filed March 6, 1917. Serial No. 152,816.

Fig. 2 is a transverse sectional view on the line 2-2 of Fig. 1, and,

Fi 3 is a fragmentary sectional view on the hue 3-3 of Fig. 2.

Referring more particularly to the drawings it will be seen that thestove to which my invention is applied comprises an outer 'shell 10, adome top 11, and the four passes,

12, 13, 14, 15. The first and fourth passes numbered, respectively, 12and 15, are elliptical in cross-section and outlined by arcuatewalls-16, 17, respectively, the endsof which engage the shell 10.Thesecond and third passes are separated by a central vertical wall 18,which connects the walls 16, 17, in line with the minor axes of theelliptical passes.

The wall which serves to bisect the space within the dome 11,is bestshown in Fig. 2 and is composed of two parallel non-alined portions 19,20, forming a wall somewhat zigzag in section, connected by a portion21, which is in efi'ect a continuation of the connecting wall 18. Thus asingle transverse wall separates the four passes. It will be noted thatthe walls 19, 20, are so disposed as not to abruptly deflect the gases.To this end it will be noted by reference to Fig. 3 that I have avoidedsharp corners by removing bricks as at 22, and by filling in bricks atpoint 23. Thus there are no angular surfaces against which the gasesimpinge. This materially reduces wear and increases the life of thestove.

Obviously the exact form of the walls is made therein without departurefrom the spirit of my invention.

I claim:

1. In a hot blast stove, the combination of a plurality of passes, adome at the upper extremity of the stove, and a wall intersecting thespace within the dome, said wall being disposed at an oblique angle tothe flo w of gases and adapted to deflect the same from one pass intothe next pass, substantially as described.

2. In a multiple pass stove, the combination of a dome-shaped top and azigzag shaped wallse' arating adjacent passes and adapted to de ectgases without an abrupt turn, substantially as described.

. 3. In a-hot-blast stove, the combination of a plurality of passes, atop at the upper extremity of the stove providing an open space abovethe passes, and a wall bisecting the space, said wall being disposed atan oblique angle with relation to the flow of gases and acting to directthe gases into an adjacent pass, substantially as described.

4. In a four-pass stove, the combination of curved walls 1 outlining thefirst and fourth passes on diametrically opposite sides of the stove, ashort wall connecting said curved walls on substantially an axial planeand extending to the roof of the stove, and

walls above said passes extending to the roof and joined at one end tosaid axial wall,

substantially as described.

5. In a four-pass stove, the combination of walls defining a space abovethe passes and a deflecting wall substantially zi zag bisecting saidspace and providing inclined surfaces against which the gases are causedto impinge when being directed into an adjacent pass, substantially asdescribed.

6. In a four-pass stove, the combination of an outside shell and a dometop, the space within the dome being utilized for changing the directionof the gases, the first and fourth passes being lo'cated on diametralopposite sides of the stove and defined by ary cuate walls which joinsaid outside shell at their extremities, a transverse vertical walluniting said arcuate walls and extending to the dome top, and walls alsoextendin to the -roof and joining said transverse W21 1, said last namedwalls acting to deflect the gases into adjacent passes, substantially asdescribed.

7. In a four-passstove, the combination of an outside wall and a dometop, the space within the dome being utilized for changing State ofIllinois, this 23rd day of February, 1917.

JAMES I. LARIMER. Witnesses:

WILLIAM J. Docon'rr, THOMAS J. SAMPSON.

